Artificial sand and method of producing same.



No. 707,!70. Patented Aug. l9, I902. J. A. SHINN.

ARTIFICIAL SAND AND METHOD OF PRODUCING SAME.

I (Application filed Oct. 21, 1901.) v (No Model.)

WITNESSES I INVENTOR Atlarney M: nouns mus ca. "mm WNW. n. c,

UNITED-ST TES I PATENT OFFICE;

JOSEPH A. SHINN, OF PITTSBURG, PENNSYLVANIA.

ARTIFICIAL SAYND AND METHOD OF PRODUCING SAME.

SPECIFICATION formingpart of Letters Patent No. 707,170, dated August 19, 1902.

Application filed October 21, 1901. Serial No. 79,462. "(No specimens.)

To all whom it may concern: 1

Be it known that I, JOSEPH ASHIN'N, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Artificial Sand and Method of Producing the Same; and I do hereby declare the'following to be a full, clear, and exact description of the. invent-ion, such as will enable others skilled in the art to which .it appertains to make and use. the same.

This invention has relation to the manu facture of an artificial or slag sand, and.

. hasfor its object the production from furnaceslag of an article of manufacture which can be used 1n the same manner and as a substitute for ordinary sand, either river-or pit, in

the manufacture of mortar, cement, tiles, brick, &c., and which will not alone possess" in a single figure a desirable form of appara tus for carrying my invention into efiect.

It is well known that the dross or slag from iron-furnaces is a waste product entailing large expense in its removal and necessitating the use of large tracts of land for its storage. Many efiorts have been made to utilize this waste product, but, so far as I. am aware, with but very little success, principally because the methods employed were so expensive that the product would not realize sufficient to repay the cost.

By my method, which is practically costless, I produce an article of manufacture far superior to what has heretofore been made and which not alone possesses superior qualities, but the product can be in numerous Ways distinguished and readily recognized as differentfrom anyslag-sand not made according to my invention. The methods heretofore employed to produce slagjsand have been to take the slag after it has come from the furnace and allowed to cool and crush in stone-Crushers to about the size ofordinar'y rubble, which is then ground in grinding- ,rolls, or in some cases the slag while still in a fluid condition is thrown into cold water, the efiect of the water being to partially disintegrate the slag, so that it can be passed through the grinding-rolls without the use of the crusher: of grinding or rubbing rolls, in addition to their expense, is that the product is not a sharp sand.

I have after a great amount of practical jetsof cold water forced against the stream or flow of slag in different directions.

A serious objection to the use I experimenting discovered that I can reduce In the. drawing I have illustrated a preferred'form of apparatus for carrying my invention into effect.

A represents the furnace, and B the open ing through which the slag is drawn. C is the under water-jet, placed as closely as possible to the flowing slag. 1

D is the upper or outer jet, which is pref erably placed slightly above and nearly at right angles to the jet 0. These jets C and D are connected with a suitable supply of water under pressure and provided with valves, sothat the supply and pressure may be regulated to suit difl'Terent conditions. A chute or apron E is provided for carrying off the slag after it hasbeen acted upon by the double streams or jets.

As the slag fiows from the furnace water is turned onto the jets, preferably at a high pressure-say from fifty to one hundred p0undsand directed onto and through the stream of slag. The effect of the double stream of water on the slag is an instant disintegration and a consequent reduction to a fine sand, the fineness of the sand depending to a considerable extent on the quantity and force of water supplied. This disintegration is not the eifectalone'of the cooling of the slag by the water, but'is aidedby the friction of the particles of slag which are driven together byxthe action of.}"the,=two streams of water.

strated by using the water on one side only,

This I have fully demon-.

and I have found that when a single jet or stream is used a large amount of the slag will not be reduced to sand and must be run through the crusher and rollers before it can be used.

The slag-sand produced by my process can be readily distinguished from other slagsands in a large number of ways, but most easily by its great density, a bushel of ordinary slag-sand weighing from forty to fifty pounds, while the slag-sand made according to my process will weigh from sixty to seventy pounds.

What I claim as new, and desire to patent, 1s-

1. The method of reducing slag to a comminuted condition consisting in subjecting the molten slag to two streams of water ap- JOSEPH A. SIIINN.

Witnesses:

MARY M. HEDDEN, A. A. CoNNoLLY. 

